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第十三届中国卫星导航年会

作者： Zhedong Liu Tengxu Zhang Junyu Li Jiao Xu Liangke Huang Lv Zhou Lilong Liu College of Geomatics and Geoinformation Guilin University of Technology Guangxi Key Laboratory of Spatial Information and Geomatics College of Resources and Environmental Science and Engineering Hubei University of Science and Technology

Typhoon is a kind of natural disaster that often happens in coastal cities in summer, which endangers people's life and property safety. Typhoons often carry a large amount of precipitable water vapor, precipitable water vapor distribution and dynamic change during the typhoon transit process is of great significance for the monitoring and forecast of typhoon. Compared with the traditional use of sounding balloon observation water vapor, PWV(Precipitable Water Vapor) retrieval using ground-based Global Navigation Satellite System(GNSS) has the advantages of high temporal and spatial resolution and near real time. Therefore, this paper inversed the PWV based on GNSS observation data in Guangxi, verified the reliability of GNSS inversion PWV by using the PWV observed by high-precision sounding station, and finally analyzed the dynamic changes of water vapor in Guangxi during the passing of Typhoon Mangkhut in combination with ERA5 reanalysis data. The results showed that:(1) GNSS-PWV has good consistency with the measured data of sounding station, which can be used to monitor the change of precipitable water vapor in extreme weather.(2) GNSS-PWV and ERA5 PWV can directly and clearly reflect the dynamic transport process of precipitable water vapor in time and space during typhoons, providing reference for predicting the movement, intensity and precipitation of typhoons.

关键词： Typhoon GNSS PWV ERA5

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Machine learning for pore-water pressure time-series prediction:Application of recurrent neural networks

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Geoscience Frontiers 2021年第1期12卷 453-467页

作者： Xin Wei Lulu Zhang Hao-Qing Yang Limin Zhang Yang-Ping Yao State Key Laboratory of Ocean Engineering Department of Civil EngineeringShanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Shanghai 200240China Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure Shanghai 200240China Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyHong KongChina Department of Civil Engineering School of Transportation Science and EngineeringBeihang University37 Xueyuan RoadHaidian DistrictBeijing 100191China

Knowledge of pore-water pressure(PWP)variation is fundamental for slope stability.A precise prediction of PWP is difficult due to complex physical mechanisms and in situ natural *** explore the applicability and advantages of recurrent neural networks(RNNs)on PWP prediction,three variants of RNNs,i.e.,standard RNN,long short-term memory(LSTM)and gated recurrent unit(GRU)are adopted and compared with a traditional static artificial neural network(ANN),i.e.,multi-layer perceptron(MLP).Measurements of rainfall and PWP of representative piezometers from a fully instrumented natural slope in Hong Kong are used to establish the prediction *** coefficient of determination(R^2)and root mean square error(RMSE)are used for model *** influence of input time series length on the model performance is *** results reveal that MLP can provide acceptable performance but is not *** uncertainty bounds of RMSE of the MLP model range from 0.24 kPa to 1.12 k Pa for the selected two *** standard RNN can perform better but the robustness is slightly affected when there are significant time lags between PWP changes and *** GRU and LSTM models can provide more precise and robust predictions than the standard *** effects of the hidden layer structure and the dropout technique are *** single-layer GRU is accurate enough for PWP prediction,whereas a double-layer GRU brings extra time cost with little accuracy *** dropout technique is essential to overfitting prevention and improvement of accuracy.

关键词： Pore-water pressure Slope Multi-layer perceptron Recurrent neural networks Long short-term memory Gated recurrent unit

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NiO lattice oxygen overflow promoted by Ti3C2 support enhances catalytic hydrolysis of carbonyl sulfide in metallurgical gas

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Nano Materials science 2024年

作者： Zhao, Shunzheng Tan, Yiran Tang, Xiaolong Gao, Fengyu Yu, Qingjun Kang, Dongjuan Liu, Yunpeng Yi, Honghong Country Department of Environmental Engineering University of Science and Technology Beijing Beijing100083 China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants Beijing100083 China Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China

Achieving efficient hydrolysis of carbonyl sulfide (COS) on catalysts at moderate temperature, while suppressing the production of sulfate and carbon, remains a daunting challenge. Herein, NiO/Ti3C2 MXene composites were prepared for the catalytic hydrolysis of COS at moderate temperature based on DFT simulation calculations that indicate the catalytic system of lattice oxygen activation-migration is conducive to COS hydrolysis. The NiO/Ti3C2 exhibited a prominent COS hydrolysis activity compared to the pure NiO. Based on various characterizations and DFT calculations, a proton capture strategy for enhanced COS hydrolysis activity was proposed. The existence of a strong electronic interaction between NiO and Ti3C2 activates the adjacent Ni-O bond at the interface, and makes the surface top-Ni active sites fully exposed under CO atmosphere. These top-Ni species accelerate the dissociation of H2O into ∗H, and facilitates protons transport to the intermediate ∗SH, thereby promoting the formation of H2S and the entire hydrolysis process. This proton capture strategy may provide help for the preparation of various high-performance catalysts for diverse hydrogenation reactions even beyond COS hydrolysis. © 2024 Chongqing University

关键词： Sulfur compounds

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Competitive Mn(Ii) Removal Occur in One Bacterium Through Microbially-Induced Carbonate Precipitation (Micp) and Indirect Mn(Ii) Oxidation

SSRN

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SSRN 2022年

作者： Ma, Huiqing Wen, Zhaoqi Yi, Xianliang Liu, Yang Yang, Hanyi Zhou, Hao Key Laboratory of Industrial Ecology and Environmental Engineering Ministry of Education School of Ocean Science and Technology Dalian University of Technology Panjin Campus China

The major source of the natural manganese oxides (MnOx) is microbial-mediated Mn(II) oxidation. Compared with the direct Mn(II) oxidation catalyzed by various proteins, the indirect Mn(II) oxidation through the other metabolic activities of microbes were less investigated. In this study, we reported a competitive Mn(II) removal process during the indirect Mn(II) oxidation of Lysinibacillus sp. MHQ-1, i.e., microbially-induced carbonate precipitation (MICP). In the presence of 1 mM Mn(II), 39.4% of free Mn(II) converted to MnCO3(s) quickly within 100 h, and then 11.6% of initial Mn(II) slowly oxidized to MnOx within 442 h. The urease activity assay and the genome sequencing confirmed the existence of urease and the absence of Mn(II)-oxidizing enzymes. The urease catalyzed the formation of carbonate ion to react with Mn(II), and then the metabolic produced ammonia promote the pH to induce the indirect Mn(II) oxidation. Genome survey suggests the urease widely exists in various Mn(II)-oxidizing bacteria (MnOB), emphasizing the importance to reconsider the biological Mn(II) removal in nutrient-rich environment. © 2022, The Authors. All rights reserved.

关键词： Manganese oxide

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Exposure of infants to antibiotics via cord blood, breast milk, and formula: A review on exposure level, temporal variation, and risk assessment

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Journal of Hazardous Materials 2025年 494卷 138665页

作者： Feng, Jiating Xu, Bentuo Magnuson, Jason T. Wang, Jiayi Gao, Yajie Qiu, Wenhui Xuan, Rongrong Gynaecology and obstetrics The First Affiliated Hospital of Ningbo University Zhejiang Province Ningbo315020 China Health Science Center Ningbo University Zhejiang Province Ningbo315211 China National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution School of Life and Environmental Science Wenzhou University Wenzhou325035 China US Geological Survey Columbia Environmental Research Center ColumbiaMO65201 United States Guangdong-Hong Kong Joint Laboratory for Soil and Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China

The pervasive use of antibiotics across various sectors, including agriculture, medicine, and aquaculture, has led to a notable increase in environmental antibiotic residues. This phenomenon has raised significant public concern regarding the potential health risks antibiotics may pose, particularly to vulnerable populations such as infants. However, the conceptualization of exposure routes of antibiotics to infants and the associated health risks has not been conducted. This review summarized three main pathways infants are exposed to antibiotics, including umbilical cord blood, breast milk, and infant formula. Antibiotic exposure levels in infants were synthesized, examining spatial and temporal trends in antibiotic concentrations across different media through clinical testing. We also analyzed the doses of antibiotics consumed by infants over time through breast milk and formula, evaluating the associated risks. Furthermore, we explored the potential adverse effects of early-life antibiotic exposure on the infant gut microbiota, physical development, and multiple organ systems. Given the global significance of antibiotic distribution, it is pertinent to comprehensively monitor antibiotic concentrations in infants and conduct longitudinal follow-up studies on their growth and development, accurately quantifying and assessing the impacts on fetal and infant health. © 2025 Elsevier B.V.

关键词： Diseases

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Endocrine disrupting effects of parabens in zebrafish (Danio rerio): New insights from transcriptomics, metabolomics, and molecular dynamics simulation

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Chemosphere 2024年 354卷 141682页

作者： Wei, Fang Yue, Huifeng Wang, Binjie Cheng, Hefa Sang, Nan Department of Environmental Engineering China Jiliang University Zhejiang Hangzhou310018 China College of Environment and Resource Research Center of Environment and Health Shanxi University Shanxi Taiyuan030006 China Key Laboratory of Drug Prevention and Control Technology of Zhejiang Province Department of Criminal Science and Technology Zhejiang Police College Zhejiang Hangzhou China MOE Laboratory for Earth Surface Process College of Urban and Environmental Sciences Peking University Beijing100871 China

Parabens (PBs), a group of widely used synthetic preservatives with potential endocrine disrupting activity, have been detected with increasing frequency in organisms and environmental matrices. This study assessed the hormone interference effects of four typical PBs, namely methylparaben (MeP), ethylparaben (EtP), propylparaben (PrP), and butylparaben (BuP), in zebrafish and elucidated the probable underlying mechanisms. Transcriptomic and metabolomic analyses showed that the differentially expressed genes and metabolites were associated with the tyrosine metabolism, arachidonate metabolism, and glycerophospholipid metabolism, indicating they were essential precursors of steroid hormone biosynthesis and metabolism. Histopathological analysis revealed impaired gonad development in the zebrafish exposed to PBs, as evidenced by the significantly increased vitellogenin (VTG) and estradiol (E2) levels. Furthermore, molecular dynamics simulation suggested that the four PBs could preferentially activate the zebrafish estrogen receptor, zfERβ2, to regulate the downstream pathways. Disruption of the amino acid metabolism and lipid metabolism, and activation of zfERβ2 signaling pathway were found to be the key mechanisms for the endocrine disrupting effects of PBs. The hormone interference effects of PBs were apparently dependent on the shared oxybenzene on their structures, with the degree of interference determined largely by the length of their alkyl chains. These findings provide new insights into the endocrine disrupting effects of PBs and could help better assess their risk to human health. © 2024 Elsevier Ltd

关键词： Molecular dynamics

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Study on Critical Velocity in Tunnels with Ceiling Beams

Journal of Intelligent Construction

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Journal of Intelligent Construction 2025年第2期2卷 1-11页

作者： Xiangliang Tian Linchuan Xiang Shigen Fu Yangyang Meng Huihang Cheng Key Laboratory of Non-Coal Mine Safety Risk Monitoring and Early Warning National Mine Safety Administration China Academy of Safety Science and Technology Beijing China School of Emergency Management and Safety Engineering China University of Mining and Technology Beijing China Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hong Kong China Department of Engineering Physics Institute of Public Safety Research Tsinghua University Beijing China

Ceiling beams at the top of tunnels are more common in actual projects. Under the influence of thermal buoyancy, the ceiling structure significantly affects the diffusion characteristics of fire smoke within the tunnel. This study investigated the influence of ceiling structural characteristics (beam height $(h_{\mathrm{B}})$ and beam spacing $(d_{\mathrm{B}}))$ on tunnel longitudinal ventilation through numerical simulation. The results show that the spacing between tunnel ceiling beams has negligible impact on the critical velocity (V), and the determination of the critical velocity is primarily correlated with the height of the ceiling beams. Moreover, it established a dimensionless critical velocity $(V_{\mathrm{c}})$ model for the tunnels with multiple beams in the ceiling, and this model is suitable for predicting the critical longitudinal velocity of tunnels with ceiling beams whose dimensionless beam height is less than 0.25. When the dimensionless beam height exceeds 0.25, the predictive values of this model are excessively high. This study broadens the application scope of fire smoke control models, which can offer technical support for the design of smoke prevention and exhaust systems in tunnels with similar structures.

关键词： Heating systems Prevention and mitigation Buoyancy Predictive models Ventilation Numerical simulation Numerical models Structural beams Exhaust systems

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Synthesis of CuS nanoparticles decorated Ti3C2Tx MXene with enhanced microwave absorption performance

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Progress in Natural science:Materials International 2020年第3期30卷 343-351页

作者： Guangzhen Cui Linbo Wang Ling Li Wei Xie Guangxin Gu Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering The Army Engineering University of PLA College of Pharmacy Chengdu University of TCM The First Scientific Research Institute of Wuxi Academy for Engineering and Technology Fudan University

MXene,a novel two-dimensional （2D） multi-layer material,has drawn unusual interest as the microwave absorbers for electromagnetic energy *** MXene-based heterostructure composites via optimizing structure is an effective strategy to endow MXene materials with high-performance microwave *** study reports the fabrication and investigation of the microwave absorption performance of a sandwich-like CuS/Ti3C2TxMXene composites prepared by loading CuS nanoparticles onto 2D Ti3C2Txvia a solvothermal *** morphology and electromagnetic absorption properties of this composite were investigated and the results demonstrated that the CuS/Ti3C2Txcomposite with a heterolayered architecture displayed superior microwave absorption *** a 35 wt%filler loading in the paraffin matrix,the minimum reflection loss value reached-45.3 dB at a frequency of 7.3 GHz and the effective absorption bandwidth achieved a value as high as 5.2 GHz with a thickness of 2.0 *** enhanced microwave absorption performances can be ascribed to the cooperation of the conductive network,interface polarization,dipole polarization,multiple reflection and ***,the synthesized CuS/Ti3C2TxMXene composites offer an efficient foundation for the design and utilization of other lightweight microwave absorbers.

关键词： CuS Nanoparticles MXene Sandwich Heterolayered architecture

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Fe⁰-dependent carbon dioxide reduction to methane via diverse electron transfer pathway in methanogenic community

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Cell Reports Sustainability 2024年第2期1卷

作者： Gao, Tianyu Xia, Lichao Zhang, Hanmin Tawfik, Ahmed Meng, Fangang School of Environmental Science and Engineering Sun Yat-sen University Guangzhou 510275 China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University) Guangzhou 510275 China Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) School of Environmental Science and Technology Dalian University of Technology No. 2 Linggong Road Dalian 116024 China National Research Centre Water Pollution Research Department Dokki Giza 12622 Egypt Department of Environmental Sciences College of Life Sciences Kuwait University P.O. Box 5969 Safat 13060 Kuwait

In natural and engineered environments, iron biocorrosion is an energy reservoir for growth of methanogens. However, how archaea accept electrons from metallic iron remains enigmatic. Here, we report that a Methanothrix-dominated methanogenic community from anaerobic granular sludge can reduce carbon dioxide (CO₂) to methane (CH₄) via electron uptake from zero-valent iron (ZVI). Through the batch experiments, a maximum CH₄ yield of 40.8 ± 0.6 μeequiv/day and an electron recovery from ZVI oxidation to CH₄ generation of 69.7% ± 6.1% are observed. Metagenome analysis and inhibition experiments indicate that electrons released by corrosive bacteria are utilized by Methanothrix for accomplishing CO₂-to-CH₄ conversion via potential intracellular and extracellular electron transfer. The results of activity tests of four electron donors (i.e., ZVI, stainless steel, H₂, and acetate) suggest that the ZVI-dependent methanogenesis dominate the overall CH₄ generation compared with hydrogenotrophic and acetoclastic methanogenesis, which provides a new insight into autotrophic metabolism of methanogens. © 2024 The Authors

关键词： biocorrosion extracellular electron transfer syntrophic methanogenesis zero-valent iron

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A review of organic corrosion inhibitors for resistance under chloride attacks in reinforced concrete: Background, Mechanisms and Evaluation methods

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Construction and Building Materials 2024年 433卷

作者： Wang, Xiaoxian Liu, Jiaping Jin, Ming Yan, Yu Tang, Jinhui Jin, Zuquan School of Material Science and Engineering Southeast University Nanjing211189 China State Key Laboratory of High Performance Civil Engineering Materials Jiangsu Sobute New Materials Co. Ltd Nanjing211103 China Department of Civil and Environmental Engineering National University of Singapore 117576 Singapore College of Civil Engineering Qingdao University of Technology Qingdao266011 China

Chloride attacks is one of the main causes that lead to deterioration of reinforced concrete(RC) structures in marine environment. Organic inhibitors as the green, environmental and economic material are applied to delay the onset of corrosion, reduce the corrosion rate and prolong the service life of RC structures effectively. This paper review summarizes the state of the art, including the classification of organic inhibitors, inhibition mechanisms and evaluation measurements. According to an overview on recent developments, the limitation can be concluded that focusing research on initial time for the lifespan of RC structures is the most important part to improve the whole service life. Moreover, comparison of organic inhibitors in plenty of literatures, there are still many questions to understand relationships between organic inhibitors, chloride and the steel bar in order to find solutions that can be better protection for RC structures. This review also sets up the method process to explore mechanisms and evaluate efficiency of organic inhibitors. © 2024 Elsevier Ltd

关键词： Reinforced concrete

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